Experiencing the same problem, and googling a little, I found a workaround using 2 plugins:
With the first you convert the Arturia Analog Factory 32 bit VST in a 64 bit VST
With the second you load the 64 bit brand new wrapped VST into Logic X.
So far I'm really satisfied (but remember to mute the volume every time you load Metaplugin in a Logic's strip: it seems to send a volume peak every time you select it as a plugin instrument)
They both cost only few bucks and have fully functional demo versions you can experiment with to be sure the fit your needs before to buy.